精製|せいせいseisei[0]heiban (flat)

Common
Definitions
  1. noun, suru verb, transitive verbrefining; purification
    When refined, crude oil yields many products.
  2. noun, suru verb, transitive verbcareful manufacture
Conjugation
Dictionary form精製する(せいせいする)
Polite (masu)精製します(せいせいします)
Negative (nai)精製しない(せいせいしない)
polite (masen)精製しません(せいせいしません)
classical zu / nu精製せず・精製せぬ(せいせいせず・せいせいせぬ)
Past (ta)精製した(せいせいした)
polite (mashita)精製しました(せいせいしました)
Past negative (nakatta)精製しなかった(せいせいしなかった)
polite (masen deshita)精製しませんでした(せいせいしませんでした)
Te form精製して(せいせいして)
Potential精製できる(せいせいできる)
Passive精製される(せいせいされる)
Causative精製させる(せいせいさせる)
Causative passive精製させられる(せいせいさせられる)
Conditional (ba)精製すれば(せいせいすれば)
tara精製したら(せいせいしたら)
Volitional精製しよう(せいせいしよう)
polite (mashou)精製しましょう(せいせいしましょう)
Imperative精製しろ(せいせいしろ)

Common forms generated by rule; see the senses for honorific or irregular usage.

Synonyms & antonyms
  • Synonym純化じゅんかWrittenWritten/formal prose: making something pure, or simplifying it. 「精製」 is about processing crude products into high-quality ones.
  • Related蒸留じょうりゅうWrittenWritten/formal prose: distillation, separating out liquids, as in 「蒸留酒」. 「精製」 is the broader term for refining and purifying.
  • Antonym粗製そせいWrittenWritten/formal prose: crude, careless manufacture. It stands opposite to 「精製」 in the fine-versus-crude contrast.
  • Antonym未精製みせいせいNeutralNeutral: the raw state of something not yet refined or purified, as in 「未精製の砂糖」. The opposite of 「精製」.

Use 「精製」 for refining crude products into high quality, as in 「精製塩」 and 「石油精製」. Use 「純化」 for making something pure, and 「蒸留」 for distillation. 「粗製」 and 「未精製」 are its opposites.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese definitions
  1. 粗製そせい品ひんに手てを加くわえて、一層いっそう良よい品質ひんしつのものにすること。
  2. 念ねんを入いれて、作つくること。
  3. 不純物ふじゅんぶつを取り除とりのぞくこと。
Kanji in this word
English equivalents

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